Tankless Water Heaters - Anyone have one of these? | The Boneyard

Tankless Water Heaters - Anyone have one of these?

CL82

NCAA Men’s Basketball National Champions - Again!
Joined
Aug 24, 2011
Messages
58,025
Reaction Score
214,451
My current water heater (40 Gal, tall) has been a work horse and still is chugging along, but after 30 years (yep 30) I figure it is time to replace it. I could just swap it out for a new 40 gallon, that would be easiest plumbing-wise, but I guess I should consider a tankless heater. I know very little about them. Does anyone have one? How is it? Is it possible to outrun the capacity (i.e., if volume gets high enough does performance drop)? What should I look for regarding specs? What you do different, if you were to buy one again? Have you seen any savings?

My utility is offering $250 off if I get one, so that makes them pretty affordable. I'd be using a gas one, does that makes a difference?
 
Joined
Dec 3, 2013
Messages
1,065
Reaction Score
2,740
My current water heater (40 Gal, tall) has been a work horse and still is chugging along, but after 30 years (yep 30) I figure it is time to replace it. I could just swap it out for a new 40 gallon, that would be easiest plumbing-wise, but I guess I should consider a tankless heater. I know very little about them. Does anyone have one? How is it? Is it possible to outrun the capacity (i.e., if volume gets high enough does performance drop)? What should I look for regarding specs? What you do different, if you were to buy one again? Have you seen any savings?

My utility is offering $250 off if I get one, so that makes them pretty affordable. I'd be using a gas one, does that makes a difference?

Are you able to do the work yourself or are you hiring the job out?
 

GG

Joined
Aug 27, 2011
Messages
621
Reaction Score
2,736
I had to replace my hot water heater last year. I did not go with a tankless system, but I went with a Rheem hybrid high efficiency tank. It was on sale at Home Depot and I also received an instant $750 rebate from the State of Connecticut. There are three modes that you can use, including energy savings mode. I love it and have saved on my electric bill.
 

CL82

NCAA Men’s Basketball National Champions - Again!
Joined
Aug 24, 2011
Messages
58,025
Reaction Score
214,451
Are you able to do the work yourself or are you hiring the job out?
I could do the plumbing, but I won't do the natural gas. So I will have someone install.
 

WestHartHusk

$3M a Year With March Off
Joined
Aug 26, 2011
Messages
4,576
Reaction Score
13,784
Had one for 5 years now at it’s been great, never going back to the tank. Maybe takes a few seconds longer to get the hot water at first, but then it just goes.
Exactly what i was going to say. Much for efficient in that its not working if it isn't needed. Also saves a lot of space.
 

CL82

NCAA Men’s Basketball National Champions - Again!
Joined
Aug 24, 2011
Messages
58,025
Reaction Score
214,451
I had to replace my hot water heater last year. I did not go with a tankless system, but I went with a Rheem hybrid high efficiency tank. It was on sale at Home Depot and I also received an instant $750 rebate from the State of Connecticut. There are three modes that you can use, including energy savings mode. I love it and have saved on my electric bill.
I am thinking about the Rheem or an equivalent AO Smith if I go back to a tank.
 
Joined
Dec 8, 2015
Messages
12,906
Reaction Score
98,540
The place I rent has one. I've had the washing machine, dishwasher, and taken a shower at the same time... never an issue with heat.

From what I read about them, they may not be worth the extra cost over a tank unless you plan on staying in your home a long time... I'd look into that.

I have been told the electric ones are not so good.

All secondhand info here... could be totally off
 
Joined
Mar 19, 2016
Messages
7,259
Reaction Score
8,291
My current water heater (40 Gal, tall) has been a work horse and still is chugging along, but after 30 years (yep 30) I figure it is time to replace it. I could just swap it out for a new 40 gallon, that would be easiest plumbing-wise, but I guess I should consider a tankless heater. I know very little about them. Does anyone have one? How is it? Is it possible to outrun the capacity (i.e., if volume gets high enough does performance drop)? What should I look for regarding specs? What you do different, if you were to buy one again? Have you seen any savings?

My utility is offering $250 off if I get one, so that makes them pretty affordable. I'd be using a gas one, does that makes a difference?
Had one in the mid 80's in my first house and hated it. But this house I just built has one, runs on propane and I love it. The tech is definately better. Have had no issues with hot water. Like CTMike said takes a a little longer for the hot to start but no problems with volume once it does
 

CL82

NCAA Men’s Basketball National Champions - Again!
Joined
Aug 24, 2011
Messages
58,025
Reaction Score
214,451
The place I rent has one. I've had the washing machine, dishwasher, and taken a shower at the same time... never an issue with heat.

From what I read about them, they may not be worth the extra cost over a tank unless you plan on staying in your home a long time... I'd look into that.

I have been told the electric ones are not so good.

All secondhand info here... could be totally off
Just checked and I can get $300 from NJ and $150 tax credit from the Feds, so the net differential between a standard water heater and tankless one will be minimal. There will be at least a little additional install cost since I will be converting from a conventional water heater.
 

ClifSpliffy

surf's up
Joined
Nov 9, 2018
Messages
9,512
Reaction Score
14,295
odd timing on the question for me. just a few weeks back while working on a design project, i incorporated electric tankless into a 100% sustainable smaller homes thing (well, septic, solar, battery, fluid radiant floor heat, etc). i luv them and have used them for years. the key is to right-size the units for the task at hand. don't lie to urself when calculating demand.
now, iffn you can wrangle a reasonably priced and simple geothermal system as well.....
anyhoo, the future belongs to on-demand water heating.
 

GG

Joined
Aug 27, 2011
Messages
621
Reaction Score
2,736
I am thinking about the Rheem or an equivalent AO Smith if I go back to a tank.
With the state incentives, the hot water tank cost me under $400 (installation not included).
 
Joined
Jan 13, 2013
Messages
646
Reaction Score
2,432
Built a new home which was completed in October of last year, have tankless/natural gas HW system, always enough hot water and electric bill savings compared to former house is a lot, I believe the HW is largest part of an electric bill unless you are someplace that has an actual winter and have central air with a heat pump, will never have a HW tank again.
 
Joined
Sep 21, 2011
Messages
5,641
Reaction Score
13,704
I’m more impressed the OP got 30 years out of his HWH. Did he flush it every year?
I’m told expected life is 10 years which is about what I got from my last one.
A local plumbing company has a deal where the changes you RO filters , test the water and flush your heater annually for $100.
i was hit or on maintenance on my old one that lasted 10 years.
I looked into tankless but I could never recoup the cost. It was 2 1/2 times the cost off a tank type with just two people at our age it just wasn’t worth it.
Gas and Electric are significantly cheaper in AZ. My worse electric bill July/Aug is cheaper than my average Ct Bill during summer. Gas except for Jan-Feb is $25-30. when it doubles
Even on the coldest days the sunshine will keep the house warm with the shutters open it’s called old fashioned solar heating. Also because the houses are so well insulted the temp will only drop a few degrees overnight.
 
Joined
Aug 26, 2011
Messages
2,953
Reaction Score
8,833
Don't have one but researched a few years back...

Was told by plumber that they wouldn't recommend an electric one...but would a gas one. We had electric so stayed with tank.

I think you also need to consider your water source...if you have hard water without a softener, it will degrade the efficiency as it scales over.

Just curious...did you change the zincs in your current tank?
 
Last edited:

Exit 4

This space for rent
Joined
Feb 3, 2012
Messages
10,489
Reaction Score
38,747
I have a twin set of gas fired tankless hotwater units. Yep, have to wait a bit for hot water.....and yep, I'm addicted to 15 minute endless hot showers. Never ever ever worry about robbing anyone of the hot water in your house when you have a tankless system. Never going back to the tank.
 
Joined
Dec 3, 2013
Messages
1,065
Reaction Score
2,740
I could do the plumbing, but I won't do the natural gas. So I will have someone install.

Natural gas will have to be 3/4" coming to the heater. The old tanked models only used 1/2", so that will cost for that. Some of the newer Tankless models can use 1/2" gas lines, but only for the smaller sizes. I would recommend going with the next model up than you are calculating to future proof it.

There is a lot of thought on if Tankless heaters really save money or not. The thought is that if you know that you can run a shower for days without losing hot water then you will not be saving any money at all. If you are going to be using it for the same time as a tanked model then yes you will save money.

Check into Recirculating pumps also. Some tankless models they come with it. They will raise your electric bill because they are running almost all the time, but you will never be without hot water at any faucet for more than a couple of seconds. The Con is that your cold water will run hot for a little while getting the hot water out of the line.
 

CL82

NCAA Men’s Basketball National Champions - Again!
Joined
Aug 24, 2011
Messages
58,025
Reaction Score
214,451
I’m more impressed the OP got 30 years out of his HWH. Did he flush it every year?
Nope
Just curious...did you change the zincs in your current tank?
No
I still can't believe you got 30 years out of a water heater!
Me either. My plumber's reaction was disbelief and then when he looked at it, he said "Damn, that thing looks brand new!"

I take zero credit for its longevity. It's a unicorn. Part of me wants to see how long it will go but I think about the hassle of the clean up from a major failure and I figure it isn't worth it. @uconnfan68.
 

Edward Sargent

Sargelak
Joined
Aug 28, 2011
Messages
3,796
Reaction Score
9,638
Put one (Rinnai) in my condo 10 years ago and its been great. Replaced a nearly 20 year old Rinnai when I bought a house 5 years ago. The 20 year old still worked fine but thought it might be on its last legs, so when I upgraded the plumbing I included a replacement. They added value in terms of selling, especially the condo which normally had the smaller water heaters.
 

Baltic

Baltic
Joined
Aug 28, 2011
Messages
135
Reaction Score
391
My current water heater (40 Gal, tall) has been a work horse and still is chugging along, but after 30 years (yep 30) I figure it is time to replace it. I could just swap it out for a new 40 gallon, that would be easiest plumbing-wise, but I guess I should consider a tankless heater. I know very little about them. Does anyone have one? How is it? Is it possible to outrun the capacity (i.e., if volume gets high enough does performance drop)? What should I look for regarding specs? What you do different, if you were to buy one again? Have you seen any savings?

My utility is offering $250 off if I get one, so that makes them pretty affordable. I'd be using a gas one, does that makes a difference?
Live on the shore in North Carolina. Installed a tankless on my old house and in the new construction a year ago. Both used propane. Definitely would recommend a tankless if you have access to natural gas or propane. The old house did not have a circulating pump and the run to the kitchen was at the opposite end of the house from the heater and it would take a minute or two for the hot water to arrive. The new house has a circulating pump and the hat water is literally instantaneous throughout the house. Probably costs more heating the circulating water but I do enjoy instant satisfaction.
 
Joined
Aug 11, 2012
Messages
209
Reaction Score
370
My house was 8 years old when i bought it back in 2014. Had to replace the tankless combo furnace/water heater 3 months after moving in. I can't remember the brand name but apparently everyone thought it was a good model when it first came out so they put them in all the houses in our development. Turns out it was junk and everyone has had to replace their's within 10 years. Was turned off by the combo idea at the time so went back to the traditional tank.
 

Online statistics

Members online
335
Guests online
2,364
Total visitors
2,699

Forum statistics

Threads
157,968
Messages
4,129,398
Members
10,016
Latest member
RipBenEmek


Top Bottom